| ITF Japan F7 | 2016/06/06 02:50 | Issei Okamura v Kento Takeuchi | 2-6,3-6 |
| ITF Japan F1 | 2016/03/08 01:00 | Issei Okamura v Kento Takeuchi | 7-6,7-6 |
| ITF Japan F4 | 2017/03/28 03:00 | Kaito Uesugi v Issei Okamura | 6-3,6-3 |
| ITF Japan F3 | 2017/03/22 06:00 | Shane Vinsant v Issei Okamura | 6-2,6-3 |
| ITF Japan F3 | 2017/03/20 02:35 | Daisuke Sumizawa v Issei Okamura | 2-6,2-6 |
| ITF Japan F2 | 2017/03/13 04:00 | Issei Okamura v Nam Hoang Ly | 2-6,2-6 |
| ITF Japan F1 | 2017/03/07 02:30 | Issei Okamura v Yuki Mochizuki | 2-6,4-6 |
| ITF China F3 | 2017/03/01 07:35 | Issei Okamura v Marco Bortolotti | 3-6,5-7 |
| ITF China F2 | 2017/02/23 03:00 | Issei Okamura v Rubin Statham | 1-6,3-6 |
| ITF China F2 | 2017/02/21 02:00 | Caio Silva v Issei Okamura | 1-6,0-6 |
| ITF Indonesia F4 | 2017/03/29 04:40 | Kento Takeuchi v Conor Berg | 6-4,6-2 |
| Challenger Quanzhou Qual | 2017/03/18 04:30 | Kento Takeuchi v Andrea Pellegrino | 1-6,3-6 |
| Challenger Quanzhou Qual | 2017/03/18 02:00 | Zhao-Tai Li v Kento Takeuchi | 1-6,3-6 |
| Challenger Shenzhen Qual | 2017/03/12 02:50 | Kento Takeuchi v Marinko Matosevic | 3-6,5-7 |
| Challenger Zhuhai Qual | 2017/03/04 03:50 | Christopher O'Connell v Kento Takeuchi | 6-1,6-1 |
| Challenger Yokohama Qual | 2017/02/26 01:00 | Kento Takeuchi v Soonwoo Kwon | 6-7,3-6 |
| Challenger Yokohama Qual | 2017/02/25 05:05 | Kento Takeuchi v Sung Min Han | 6-2,6-4 |
| Challenger Kyoto Qual | 2017/02/18 06:30 | Peter Kobelt v Kento Takeuchi | 7-5,7-6 |